JP2007006632A - Three-phase rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a three-phase rotary electric machine wherein favorable insulating properties are provided even when a polyphase coil is inserted into a stator with an automatic coil inserter. <P>SOLUTION: The coil ends of a three-phase coil are respectively insulated with interphace insulation paper 30. The upper interphase insulation paper 30A and the lower interphase insulation paper 30B are parallel with each other. They are constructed of first and second slot insertion portions 32A, 32A', 32B, 32B' and an interphase insulation portion 34 integrally formed at one ends of the first and second slot insertion portions. The first and second slot insertion portions 32A, 32A' of the upper interphase insulation paper are respectively inserted from one ends of first and second slots. Then, the first and second slot insertion portions 32B, 32B' of the lower interphase insulation paper are respectively inserted from the other ends of the first and second slots. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a three-phase rotating electric machine, and more particularly, to a three-phase rotating electric machine suitable for insulating interphase coils.

  As a method for insulating an interphase coil in a conventional rotating electric machine, for example, as described in Japanese Patent Application Laid-Open No. 2003-333785, a flat insulating paper is cut out, from a slot insertion portion and an interphase insulating portion at a coil end. What uses what was made into the shape of the following becomes known. At the time of manufacturing a stator for a multi-phase rotating electrical machine, a first stator coil is inserted into a slot of the stator, a coil end portion is bent by pressing, and a slot insertion portion of a flat interphase insulating paper is inserted into another slot, Further, the second phase coil is inserted into the same slot, and the coil end portion is bent. Here, a conductive wire coated with an insulating film such as enamel is used as the coil. However, when the rated voltage of the rotating electrical machine is a high voltage such as 600 V, the first coil end portion is Insulation between the first phase coil and the second phase coil is insulated by the interphase insulating portion of the flat interphase insulating paper because the dielectric strength between the second phase coil and the second phase coil is low. As a result, the withstand voltage is improved. Similarly, interphase insulating paper is interposed between the second phase coil and the third phase coil to improve the withstand voltage.

JP 2003-333785 A

  When inserting the coil into the stator manually, the coil insertion operation can be performed while visually confirming the positional relationship of the insulating paper. Therefore, there is no interphase between the first phase coil and the second phase coil. It was possible to accurately position the insulation.

  However, when inserting the coil using an automatic insertion machine, after automatically inserting the first phase coil, after positioning the interphase insulating paper at a predetermined position, when automatically inserting the second phase coil, There is a possibility that the position of the interphase insulating paper may be shifted, and there is a problem in that the insulating property is deteriorated because the position of the interphase insulating portion that should be between the first phase coil and the second phase coil is shifted in the coil end portion. found.

  An object of the present invention is to provide a three-phase rotating electrical machine with improved insulation even when a multi-phase coil is inserted into a stator by an automatic coil insertion machine.

(1) In order to achieve the above object, according to the present invention, three-phase coils are sequentially wound around a rotor and a stator core by distributed winding, and the coil end portions of the three-phase coils are insulated by interphase insulating paper. The interphase insulating paper inserted into the stator slot includes an upper interphase insulating paper and a lower interphase insulating paper, and the upper interphase insulating paper and the lower interphase insulating paper The interphase insulating papers are parallel to each other, and are integrated with the first and second slot insertion portions inserted into the slots of the stator and one end of the first and second slot insertion portions. The first and second slot insertion portions of the upper interphase insulating paper are respectively inserted from one end side of the first and second slots. The first and second slot insertion portions of the lower interphase insulating paper are respectively inserted from the other end side of the first and second slots, and the upper interphase is inserted in the first slot. The first slot insertion portion of insulating paper and the first slot insertion portion of the lower interphase insulating paper overlap, and in the second slot, the second slot insertion portion of the upper interphase insulating paper, The second slot insertion portion of the lower interphase insulating paper overlaps.
With this configuration, even when the multiphase coil is inserted into the stator by the automatic coil insertion machine, the insulation can be improved.

  (2) In the above (1), preferably, in the first and second slots, the first and second slot insertion portions of the upper interphase insulating paper and the first of the lower interphase insulating paper. In a state where the first and second slot insertion portions are respectively inserted, the first slot insertion portion of the upper interphase insulating paper, the first slot insertion portion of the lower interphase insulating paper, and the upper phase The second slot insertion portion of the insulating paper and the second slot insertion portion of the lower interphase insulating paper protrude from both end portions of the first and second slots.

  (3) In the above (1), preferably, one of the three-phase coils is automatically inserted into the slot from the side where the lower interphase insulating paper is inserted.

  According to the present invention, even when a multiphase coil is inserted into a stator by an automatic coil insertion machine, the insulation of the three-phase rotating electrical machine can be improved.

Hereinafter, the configuration of a three-phase rotating electrical machine according to an embodiment of the present invention will be described with reference to FIGS.
First, the configuration of the three-phase rotating electrical machine according to the present embodiment will be described with reference to FIG.
FIG. 1 is a side view showing a configuration of a three-phase rotating electrical machine according to an embodiment of the present invention. In addition, in FIG. 1, the side shape of the state which removed the end bracket is shown.

  The three-phase rotating electrical machine according to the present embodiment includes a rotor 10 and a stator 20. The rotor 10 is supported rotatably with respect to the stator 20. The rotor 10 includes a rotating iron core 14 fixed to the shaft 12. The rotating iron core 14 is a laminate of thin steel plates. The rotary iron core 14 is formed with eight holes having a rectangular cross section in advance, and eight permanent magnets 16 are embedded in the holes. The permanent magnets 16 arranged at equal intervals in the circumferential direction of the rotating iron core 14 are magnetized so that the polarities of adjacent permanent magnets are opposite to each other.

  A predetermined gap is formed between the inner peripheral portion of the stator 20 and the outer peripheral portion of the rotor 10. The stator 20 includes a core 22 and three-phase coils 24U, 24V, and 24W. The core 22 includes a ring-shaped yoke core and a stator core formed so as to protrude radially on the inner peripheral side of the yoke core. A slot for inserting a coil is formed between adjacent stator cores. Here, 48 slots are formed. The yoke core and the stator core are integrally formed. The core 22 is a laminate of thin steel plates. The three-phase coils 24U, 24V, and 24W are wound with distributed windings arranged across a plurality of salient poles (stator cores). First, eight U-phase coils 24U are inserted into slots using an automatic coil insertion machine, and then eight V-phase coils 24V are automatically inserted into another slot. Before inserting the V-phase coil 24V, eight first interphase insulating papers 30 are inserted and positioned in advance in the slots into which the V-phase coil 24V is inserted. After the eight V-phase coils 24V, eight W-phase coils 24W are inserted into further slots. In addition, before inserting the W-phase coil 24W, eight second interphase insulating papers 30A are inserted and positioned in advance in the slots into which the W-phase coil 24W is inserted. Lead wires are taken out from the end portions of the three-phase coils 24U, 24V, and 24W, and terminals are fixed to the tips. Therefore, each of the three-phase coils 24U, 24V, and 24W can be energized by energizing the terminals.

  As described above, the rotating electrical machine shown in FIG. 1 is an 8-pole 48-slot distributed winding rotating electrical machine, and is an embedded magnet type synchronous motor when used as a motor. This motor is used, for example, as a motor of a four-wheel drive hybrid vehicle in which one of the front and rear wheels is driven by an engine and the other is driven by a motor. In the case of a motor having a rated voltage of 300 V and an output of 500 KW, the stator 20 has an outer diameter R1 of, for example, 250 mm, an inner diameter R2 of, for example, 150 mm, and an axial length of, for example, 45 mm. Each of the three-phase coils 24U, 24V, and 24W is obtained by arranging three copper wires having a wire diameter of 0.8 mm in parallel and winding them 48T.

  Next, the manufacturing process of the stator of the three-phase rotating electrical machine according to the present embodiment and the shape of the interphase insulating paper used for interphase insulation will be described with reference to FIGS.

  FIG. 2 is a front view showing a manufacturing process of the stator of the three-phase rotating electrical machine according to the embodiment of the present invention. FIG. 3 is a front view showing a manufacturing process of the stator of the three-phase rotating electrical machine according to the embodiment of the present invention. FIG. 4 is a front view of the first upper interphase insulating paper used for the stator of the three-phase rotating electrical machine according to the embodiment of the present invention. FIG. 5 is a front view of the first lower interphase insulating paper used for the stator of the three-phase rotating electrical machine according to the embodiment of the present invention. FIG. 6 is a partial perspective view showing a state where the first upper interphase insulating paper is inserted into the stator of the three-phase rotating electrical machine according to the embodiment of the present invention. FIG. 7 is a partial perspective view showing a state in which the first lower interphase insulating paper is inserted into the stator of the three-phase rotating electrical machine according to the embodiment of the present invention. FIG. 8 is a front view showing a manufacturing process of the stator of the three-phase rotating electrical machine according to the embodiment of the present invention. FIG. 9 is a front view showing a manufacturing process of the stator of the three-phase rotating electrical machine according to the embodiment of the present invention. FIG. 10 is a front view of the second upper interphase insulating paper used for the stator of the three-phase rotating electrical machine according to the embodiment of the present invention. FIG. 11 is a front view of the second lower interphase insulating paper used for the stator of the three-phase rotating electrical machine according to the embodiment of the present invention. FIG. 12 is a partial perspective view showing a state in which the second upper interphase insulating paper is inserted into the stator of the three-phase rotating electrical machine according to the embodiment of the present invention. FIG. 13 is a partial perspective view showing a state in which the second lower interphase insulating paper is inserted into the stator of the three-phase rotating electrical machine according to the embodiment of the present invention. In addition, the same code | symbol as FIG. 1 and the same code | symbol of each figure have shown the same part.

  First, eight U-phase coils 24U formed in advance are simultaneously attached to an automatic coil insertion device (not shown), and the coils are arranged in a line from the direction of one end of the U-phase coil 24U in the slot S of the stator core 22. Are sequentially inserted from the slot opening SO side, and simultaneously inserted in the slot rearward direction, the U-phase coil 24U is assembled as shown in FIG.

  Next, as shown in FIG. 3, before inserting the V-phase coil 24V into the other slot, the eight first interphase insulating papers 30 are inserted into the slots where the V-phase coil 24V is inserted.

  Here, the shape of the first interphase insulating paper 30 and the mounting state in the slot will be described with reference to FIGS.

  The first interphase insulating paper 30 is made of insulating paper that is divided into two parts, a first upper interphase insulating paper 30A shown in FIG. 4 and a first lower interphase insulating paper 30B shown in FIG. 4 shows the planar shape of the first upper interphase insulating paper 30A, and FIG. 5 shows the planar shape of the first lower interphase insulating paper 30B. The first interphase insulating paper 30A, 30B has a three-dimensional shape that is previously folded at a predetermined position. In FIGS. 4 and 5, the broken line indicates a valley fold, and the alternate long and short dash line indicates a mountain fold. ing.

  As shown in FIG. 4, the first upper interphase insulating paper 30A includes slot insertion portions 32A and 32A ′ that are parallel to each other, and an interphase insulating portion 34A that is integrally formed at the upper ends of the slot insertion portions 32A and 32A ′. Consists of. Further, arc-shaped notches 36A and 36A 'are respectively provided at positions where the slot insertion portions 32A and 32A' are connected to the interphase insulating portion 34A. The first upper interphase insulating paper 30A has a shape obtained by punching one interphase insulating paper as shown in FIG.

  Further, as apparent from comparison with FIG. 6, at the positions indicated by the broken lines in the center of the slot insertion portions 32A and 32A ', both sides of the broken lines are folded toward the front side of the page, and are folded into valley folds. Further, a protrusion 34XA is formed in the inner peripheral direction of the interphase insulating portion 34A. As is apparent from comparison with FIG. 6, the protrusion 34XA is mountain-folded at the position indicated by the alternate long and short dash line, and protrudes as shown in FIG.

  Further, a bent ear portion 34YA is formed in the outer peripheral direction of the interphase insulating portion 34A. As is clear from the comparison with FIG. 6, the folding ear 34 </ b> YA is bent as shown in FIG. 6 by valley folding at a position indicated by a broken line.

  Further, as shown in FIG. 5, the first lower interphase insulating paper 30B is composed of slot insertion portions 32B and 32B ′ which are parallel to each other and interphase insulation formed integrally at the upper ends of the slot insertion portions 32B and 32B ′. Part 34B. Further, arc-shaped notches 36B and 36B 'are provided at positions where the slot insertion portions 32B and 32B' and the interphase insulating portion 34B are connected. The first lower interphase insulating paper 30B has a shape obtained by punching one interphase insulating paper as shown in FIG.

  Further, as apparent from the comparison with FIG. 7, at the positions indicated by the broken lines in the center of the slot insertion portions 32 </ b> B and 32 </ b> B ′, both sides of the broken lines are folded toward the front side of the page and folded into valley folds. In addition, a protrusion 34XB is formed in the inner peripheral direction of the interphase insulating portion 34B. As is apparent from comparison with FIG. 7, the protrusion 34XB is mountain-folded at the position indicated by the alternate long and short dash line, and protrudes as shown in FIG.

  A bent ear 34YB is formed in the outer peripheral direction of the interphase insulating part 34B. As apparent from comparison with FIG. 7, the bent ear 34YB is bent at the position indicated by the broken line as shown in FIG.

  That is, the first upper interphase insulating paper 30A shown in FIG. 4 and the first lower interphase insulating paper 30B shown in FIG. 5 have basically the same shape, but are vertically symmetrical. ing.

  Next, a state where the first upper interphase insulating paper 30A is mounted in the slot will be described with reference to FIG.

  As shown in FIG. 6, a first U-phase coil 24U1 is inserted in advance in slots S1 and S6, and a second U-phase coil 24U2 is inserted in a slot different from slot S7. . Here, slot S3 and slot S8 are slots into which V-phase coils are inserted next. Then, slot insertion portions 32A and 32A 'of the first upper interphase insulating paper 30A are inserted into the slots S3 and S8 from the upper side of the slots S3 and S8, that is, from the direction of the arrow A, respectively.

  The protrusion 34XA of the interphase insulating part 34A is provided at a position where the first U-phase coil 24U1 and the second U-phase coil 24U2 each cover a portion that becomes a coil end from the position where it is inserted into the slot. The other interphase insulating portion 34A is provided at a position covering the coil end portions of the coils 24U1 and 24U2. In the illustrated state, the interphase insulating portion 34A is shown floating from the coils 24U1 and 24U2, but when the interphase insulating paper 30A is actually mounted in the slot, the interphase insulating portion 34A and the coils 24U1 and 24U2 are shown. Is in contact or close proximity.

  Here, the bent ear 34YA will be described with reference to FIG. As shown in FIG. 3, in the state where eight interphase insulating papers are mounted in the slots, the folding ears 34YA are bent in the inner circumferential direction of the stator 20, and the eight interphase insulating papers 30A The fold shape is such that the bent ears 34YA are in contact with each other. This is because, when the V-phase coil is subsequently inserted, even if the interphase insulating paper 30 </ b> A is deformed by the insertion pressure, the interphase insulating paper 30 is in contact with each other at the bent ear 34 </ b> YA. This is because it is possible to prevent the position shift and to prevent the displacement. Note that when the eight interphase insulating papers 30A are mounted in the slots, the adjacent bent ears 34YA may be in contact with each other, or in close contact with each other by inserting a V-phase coil. You can do it.

  Here, the arc-shaped notches 36A and 36A 'will be described again with reference to FIG. The arc-shaped notches 36A and 36A 'are provided at positions where the slot insertion portions 32A and 32A' are connected to the interphase insulating portion 34A. Therefore, the width W4 at the position of the notch 36A is narrower than the width W3 of the slot insertion portions 32 and 32 '(W4 <W3). The slot insertion portions 32A and 32A 'are bent into a V shape. On the other hand, as described with reference to FIG. 3, the bent ear 34YA needs to extend linearly in a direction perpendicular to the slot insertion portions 32A and 32A '. When the slot insertion portions 32A and 32A 'are bent into a V shape, notches 36A and 36A' are formed in order to prevent the bending ear portion 34YA from being bent by the bending force.

  Next, the mounting state of the first lower interphase insulating paper 30B in the slot will be described with reference to FIG.

  As shown in FIG. 7, a first U-phase coil 24U1 is inserted in advance in slots S1 and S6, and a second U-phase coil 24U2 is inserted in advance in a slot different from slot S7. . Here, slot S3 and slot S8 are slots into which V-phase coils are inserted next. In the slots S3 and S8, slot insertion portions 32B and 32B ′ of the first lower interphase insulating paper 30B are provided so that the slot insertion portion overlaps the first upper interphase insulating paper 30A, respectively. Are inserted from the lower side of the slots S3 and S8, that is, from the arrow B direction.

  At this time, the lengths of the slot insertion portions 32A, 32A ′, 32B, and 32B ′ are sufficiently longer than the length of the slot S, and the first upper interphase insulating paper 30A and the first When the lower interphase insulating paper 30B is inserted, they overlap each other, and as shown in FIG. 7, the tips of the slot insertion portions 32B and 32B ′ protrude from the end of the interphase insulating portion 34A. Similarly, the tips of the slot insertion portions 32A and 32A 'protrude from the end portion of the interphase insulating portion 34B. This protrusion amount is such an amount that it can be pinched with a finger and pulled in the insertion direction of the slot insertion portion, for example, about 15 to 20 mm.

  Here, when the second phase coil is inserted after the first interphase insulating paper 30A, 30B is installed in the slot, a force is applied to the slot insertion portions 32, 32 ′, so that the notches 36A, 36B, If the force concentrates on 36C and 36D, the interphase insulating paper 30 may break at the notches 36A, 36B, 36C, and 36D. Therefore, the notches 36A, 36B, 36C, and 36D are formed in an arc shape to prevent stress from being concentrated on a part and breaking.

  The slot S has a U-shaped cross section, and the width W1 of the inlet (inner side of the stator) is narrower than the width W2 of the back (outer side of the stator) (W1 <W2). For example, when the outer diameter R1 of the stator 20 is 250 mm, for example, in an 8-pole 48-slot distributed winding electric rotating machine, the width W1 is slightly smaller than the wire diameter of 0.8 mm for each of the three-phase coils 24U, 24V, and 24W. The width W2 is 6 mm.

  On the other hand, the width of the slot insertion portion 32A is wider than the maximum width of the slot S (the deepest portion width W2) before the folded state. Specifically, when the width W2 is 6 mm, the width of the slot insertion portion 32A is 14 mm. Since the slot insertion portion 32A is bent in a V shape, the slot insertion portion 32A is positioned at the innermost portion of the slot S when the slot insertion portion 32A is inserted into the slot S of the stator.

  Conventionally, since the width of the slot insertion portion is smaller than the maximum width of the slot width, the slot insertion portion is positioned at an appropriate position in the slot with the slot insertion portion inserted into the slot. Therefore, after that, when the second phase coil is inserted, it is pushed by the coil and moves to the inner part of the slot. At that time, the coil moves to the inner part of the slot while avoiding the slot inserting part of the interphase insulating paper. At this time, the position of the interphase insulating paper may shift.

  On the other hand, in the present embodiment, the slot insertion part 32A of interphase insulating paper is positioned at the innermost part of the slot S. Therefore, even when the second phase coil is inserted, the slot insertion part 32A is always in the innermost part of the slot S. The position does not shift. Therefore, since the position of the coil end portion of the interphase insulating paper is not displaced, the interphase insulating portion is reliably positioned between the first phase coil and the second phase coil in the coil end portion, so that the insulation can be improved.

  The slot insertion portion 32A has a V shape as described above. Then, as shown in FIG. 6, the V-shaped opening direction is directed to the opening direction of the slot S. By adopting such a positional relationship, when the second phase coil is inserted, the second phase coil is received by the V-shaped opening of the slot insertion portion 32A. It is hard to occur. Since slot insertion portion 32A is wider than the maximum width of the slot, slot insertion is similarly performed even in an inverted V shape (when the V-shaped opening direction of slot insertion portion 32A is directed toward the innermost portion of slot S). Since the portion 32A is positioned at the innermost portion of the slot, the effect of preventing the displacement of the coil end portion can be achieved. However, when the slot insertion part 32A is slightly lifted from the innermost part, the direction where the V-shaped opening direction is directed to the opening direction of the slot S is the innermost part when the second phase coil is inserted. It is advantageous in that it is positioned in

  FIG. 8 shows a state in which the second phase coil (V phase coil) 24V has been inserted into the slot. As described in FIG. 6, when the interphase insulating paper 30 is inserted into the slots S3 and S8, the second phase coil 24V is also inserted into the slots S3 and S8.

  Next, as shown in FIG. 9, before inserting the W-phase coil 24W into another slot, the eight second interphase insulating papers 30V are inserted into the slots where the W-phase coil 24W is inserted.

  Here, the shape of the second interphase insulating paper 30 </ b> W and the mounting state in the slot will be described with reference to FIGS. 10 to 13.

  The second interphase insulating paper 30W is made of insulating paper that is divided into two vertically, a second upper interphase insulating paper 30WA shown in FIG. 10 and a second lower interphase insulating paper 30WB shown in FIG. FIG. 10 shows the planar shape of the second upper interphase insulating paper 30WA, and FIG. 11 shows the planar shape of the second lower interphase insulating paper 30WA. The second interphase insulating papers 30WA and 30WB have a three-dimensional shape that is bent in advance at predetermined positions. In FIGS. 10 and 11, the broken lines indicate valley folds, and the alternate long and short dash lines indicate mountain folds. ing.

  As shown in FIG. 10, the second upper interphase insulating paper 30WA includes slot insertion portions 32A and 32A ′ that are parallel to each other, and an interphase insulating portion 34A ′ that is integrally formed at the upper ends of the slot insertion portions 32A and 32A ′. It consists of. Further, arc-shaped notches 36A and 36A 'are provided at positions where the slot insertion portions 32A and 32A' are connected to the interphase insulating portion 34A '. The second upper interphase insulating paper 30WA has a shape obtained by punching one interphase insulating paper as shown in FIG.

  Further, as apparent from comparison with FIG. 12, at the positions indicated by the broken lines in the center of the slot insertion portions 32A and 32A ', both sides of the broken lines are folded toward the front side of the page, and are folded into valley folds. Further, a protrusion 34XA 'is formed in the inner peripheral direction of the interphase insulating portion 34A'. As is apparent from comparison with FIG. 12, the protrusion 34XA 'is fold-folded at the position indicated by the alternate long and short dash line, and protrudes as shown in FIG.

  Further, a bent ear portion 34YA is formed in the outer peripheral direction of the interphase insulating portion 34A '. As apparent from comparison with FIG. 12, the bent ear 34YA is bent as shown in FIG. 12 by valley folding at the position indicated by the broken line.

  Further, as shown in FIG. 11, the second lower interphase insulating paper 30WB includes slot insertion portions 32B and 32B ′ which are parallel to each other and interphase insulation formed integrally at the upper ends of the slot insertion portions 32B and 32B ′. Part 34B '. In addition, arc-shaped notches 36B and 36B 'are provided at positions where the slot insertion portions 32B and 32B' are connected to the interphase insulating portion 34B '. The second lower interphase insulating paper 30WB has a shape obtained by punching one interphase insulating paper as shown in FIG.

  Further, as apparent from the comparison with FIG. 13, at the positions indicated by broken lines in the center of the slot insertion portions 32B and 32B ', both sides of the broken lines are folded toward the front side of the page, and are folded into valley folds. Further, a protrusion 34XB 'is formed in the inner peripheral direction of the interphase insulating part 34B'. As is apparent from comparison with FIG. 13, the protrusion 34XB 'is mountain-folded at the position indicated by the alternate long and short dash line, and protrudes as shown in FIG.

  Further, a bent ear portion 34YB is formed in the outer peripheral direction of the interphase insulating portion 34B '. As apparent from comparison with FIG. 13, the folding ear 34 </ b> YB is bent as shown in FIG. 13 by valley folding at the position indicated by the broken line.

  That is, in the second interphase insulating papers 30WA and 30WB, the slot insertion portions 32 and 32 'have the same shape as compared to the first interphase insulating papers 30A and 30B. Further, in the interphase insulating portions 34A ′ and 34B ′, the positions of the protruding portions 34XA ′ and 34XB ′ are different from the protruding portions 34XA and 34XB of the first interphase insulating paper 30A and 30B, but the other shapes are the same. It is.

  Next, the mounting state of the second upper interphase insulating paper 30WA in the slot will be described with reference to FIG. In addition, illustration is abbreviate | omitted about the mounting state of the 1st phase insulation paper 30A, 30B.

  As shown in FIG. 12, a first U-phase coil 24U1 is inserted in advance in slots S1 and S6, and a second U-phase coil 24U2 is inserted in a slot different from slot S7. . After the slot insertion portions 32 and 32 'of the first interphase insulating paper 30A and 30B are inserted into the slot S3 and the slot S8, respectively, the second V-phase coil 24V2 is automatically inserted. Second V-phase coil 24V2 is inserted from the direction of arrow B using an automatic insertion machine.

  At this time, before inserting the second V-phase coil 24V2, the first upper interphase insulating paper 30A is inserted in the direction of arrow A, and then the first lower interphase insulating paper 30B is inserted from the direction of arrow B. Therefore, the first lower interphase insulating paper 30B is located on the inner peripheral side. Since the second V-phase coil 24V2 is inserted using the automatic insertion machine from the same direction as the insertion direction of the first lower interphase insulating paper 30B, the first interphase insulating paper 30A and 30B are displaced. Does not occur.

  A first V-phase coil 24V1 is inserted in a slot different from the slot S2, and a third V-phase coil 24V3 is inserted in a slot different from the slot S9. Here, the slot S5 and the slot S10 are slots into which the V-phase coil is inserted next. The slot insertion portions 32 and 32 'of the second upper interphase insulating paper 30WA are inserted into the slots S5 and S10, respectively.

  The protrusion 34XA ′ of the interphase insulating portion 34A ′ is provided at a position where the second V-phase coil 24V2 and the third V-phase coil 24V3 each cover the portion that becomes the coil end from the position where it is inserted into the slot. Yes. The other interphase insulating portion 34A 'is provided at a position covering the coil end portions of the coils 24V2 and 24V3. In the illustrated state, the interphase insulating portion 34A ′ is shown floating from the coils 24V2 and 24V3. However, when the interphase insulating paper 30WA is actually mounted in the slot, the interphase insulating portion 34A ′ and the coil 24V2 are shown. , 24V3 are in contact with or close to each other.

  FIG. 1 shows a state where the third phase coil 24W has been inserted into the slot. As described in FIG. 12, when the interphase insulating paper 30WA is inserted into the slots S5 and S10, the third phase coil 24W is also inserted into the slots S5 and S10.

  Next, the mounting state of the second lower interphase insulating paper 30WB in the slot will be described with reference to FIG.

  As shown in FIG. 13, after the slot insertion portions 32 and 32 ′ of the second upper interphase insulating paper 30WA are inserted into the slots S5 and S10, respectively, the second lower interphase insulating paper 30WB is inserted into the same slot. Slot insertion portions 32 and 32 'are inserted from the direction of arrow B, respectively.

  Thereafter, the third phase coil 24W is inserted into a predetermined slot. At that time, the slot insertion portions 32 and 32 'of the interphase insulating paper protrude from the end portions of the slots. And after coil end shaping | molding, this protrusion part is pinched with a finger | toe, and it can respectively adjust the mounting position of interphase insulation paper by pulling in the insertion direction of a slot insertion part.

  The present embodiment can be applied not only to a three-phase distributed winding motor but also to a three-phase distributed winding generator.

As described above, according to the present embodiment, even when a multiphase coil is inserted into the stator by an automatic coil insertion machine, misalignment of the interphase insulating paper is prevented and the insulation of the three-phase rotating electrical machine is improved. To get.

It is a side view which shows the structure of the three-phase rotary electric machine by one Embodiment of this invention. It is a front view which shows the manufacturing process of the stator of the three-phase rotary electric machine by one Embodiment of this invention. It is a front view which shows the manufacturing process of the stator of the three-phase rotary electric machine by one Embodiment of this invention. It is a front view of the 1st upper side interphase insulation paper used for the stator of the three-phase rotary electric machine by one embodiment of the present invention. It is a front view of the 1st lower side phase insulation paper used for the stator of the three-phase rotating electrical machine by one embodiment of the present invention. It is a fragmentary perspective view which shows the state which inserted the 1st upper side interphase insulating paper with respect to the stator of the three-phase rotary electric machine by one Embodiment of this invention. It is a fragmentary perspective view which shows the state which inserted the 1st lower side phase insulation paper with respect to the stator of the three-phase rotary electric machine by one Embodiment of this invention. It is a front view which shows the manufacturing process of the stator of the three-phase rotary electric machine by one Embodiment of this invention. It is a front view which shows the manufacturing process of the stator of the three-phase rotary electric machine by one Embodiment of this invention. It is a front view of the 2nd upper phase interphase insulation paper used for the stator of the three phase rotating electrical machine by one embodiment of the present invention. It is a front view of the 2nd lower side phase insulation paper used for the stator of the three phase rotating electrical machine by one embodiment of the present invention. It is a fragmentary perspective view which shows the state which inserted the 2nd upper side interphase insulating paper with respect to the stator of the three-phase rotary electric machine by one Embodiment of this invention. It is a fragmentary perspective view which shows the state which inserted the 2nd lower side phase insulation paper with respect to the stator of the three-phase rotary electric machine by one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Rotor 20 ... Stator 22 ... Stator core 24U ... U phase coil 24V ... V phase coil 24V ... V phase coil S ... Slot 30A, 30B, 30WA, 30WB ... Interphase insulation paper 32A, 32A ', 32B, 32B' ... Slot insertion Portions 34A, 34B, 34VA, 34VB ... Interphase insulating portions 34XA, 34XB, 34XA ', 34XB' ... Projections 34YA, 34YB ... Bent portions 36A, 36A ', 36B, 36B' ... Notches

Claims (3)

A three-phase rotating electrical machine having a rotor and a stator core in which three-phase coils are sequentially wound around the stator core and the coil end portions of the three-phase coils are respectively insulated by interphase insulating paper,
The interphase insulating paper inserted into the slot of the stator consists of an upper interphase insulating paper and a lower interphase insulating paper,
The upper interphase insulating paper and the lower interphase insulating paper are parallel to each other, and the first and second slot inserting portions inserted into the slots of the stator, and the first and second slot inserting portions, respectively. An interphase insulating portion formed integrally with one end of the
After the first and second slot insertion portions of the upper interphase insulating paper are respectively inserted from one end side of the first and second slots, the other of the first and second slots is inserted. From the end side, the first and second slot insertion portions of the lower interphase insulating paper are respectively inserted,
In the first slot, the first slot insertion portion of the upper interphase insulating paper and the first slot insertion portion of the lower interphase insulating paper overlap, and in the second slot, the upper interphase insulating paper overlaps. The three-phase rotating electrical machine, wherein the second slot insertion portion of insulating paper and the second slot insertion portion of the lower interphase insulating paper overlap. In the three-phase rotating electrical machine according to claim 1,
The first and second slot insertion portions of the upper interphase insulating paper and the first and second slot insertion portions of the lower interphase insulating paper are respectively inserted into the first and second slots. In the state, the first slot insertion portion of the upper interphase insulating paper, the first slot insertion portion of the lower interphase insulating paper, the second slot insertion portion of the upper interphase insulating paper, The three-phase rotating electrical machine, wherein the second slot insertion portion of the lower interphase insulating paper protrudes from both end portions of the first and second slots. In the three-phase rotating electrical machine according to claim 1,
One of the three-phase coils is automatically inserted into the slot from the side where the lower interphase insulating paper is inserted.

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